Plate-glass holder



June 8 1926. y

- J. :CARRIE PLATE GLASS HQLDER Filed sept. 12. 1924 l Aliatenl'ieotlJune S, 1926. I i 4 UNITED',STATEsraArEsNT recentie.

Q JAMEscAERIn or BUTLER, PENNSYLVANIA, AssisNoRyoEoNE-THIEEvroei-IA,Emis

I -G'ErcE oEPAssAIc, NEWJERSEY, y MILWAUKEE, WISCONSIN.

ANn'oNE-Trrinn'tro wrLLiAivi nsAWYEE, 0E

' PLA'rE-etiirssl HOLDER.

" ""A'ppiicafion sied/september 12,1924; 'seriai-Ntsrsmw. i

` l` This invention relates toplateglassholdl ers and isparticularly'directed to. automatic-l vrplate glassholders. f Infplateglass holders,

as heretofore constructed, inwhich plate or slab of glasswas" placed on'theholding f table, 'difficulty' was experienced Vdue to the fact that'if the glass-,cracked adjacent ene-` of the suction'cups that all' ofthesuction" Further than thi s, -the` appli-v 1 -cation of fall of the cupsto the glasswas not insured and itV `occasionally' 'happened vthat l allof the cups would not seat upontlie=glasscups released..

and consequently the suction was finally re# leased in all ofthe cups.

This invention is designed to overcoine the above noted defects andobjects of such invention are to provide a plate glass holder in whichthe suction inthe several cups is independent, and in which, after arelease occurs in one of the cups, the suction in the remaining cups isunaltered.

Further objects are to provide la simple and easily operated means forapplying and removing the suction cups and to provide a constructionwhich may bevery easily and cheaply manufactured and which is simple inoperation.

An embodiment of the invention is shown in the accompanying drawing, inwhich Figure 1 is an enlarged sectional view through one of the cupsand-the adjacent.

portion of the table. p f Y Figure 2 is a planview of the table drawn toa smaller scale and showing a slab of glass partly broken away, inposition.

Referring to the drawing in detail, it will be seen that 4the tablecomprises a body porn tion composed of a series of rectangular units 1which are locked together by keys 2 so as to attain accuratel aligningof the several units forming the table. Each of these units is providedvwith a cylindrical aperture therethrough as indicated at 3 (seeFigure 1) and is further provided with an enlarged aperture 4 adjacentits upper portion. yThis aperture is provided with a recessed inarginalaperture 5, as shown in Figure 1.

The suction apparatus comprises a cylinder 6 which is tted and securedwithin the aperture 3. This cylinder is provided with upstanding arms 7"which carry a ring like member 8 `provided with an annular channelwithin which a padding or gasket consisting preferably of a ringof/rubber 9 is provided, such padding or riiigbeing concentricwithland'sinallerthanfa surrounding ring l() carried .bythebody'portion 1. 1

1' yThe'cylinder 6has itslower. endclosed by 'means of a screw cap 11whichis'provided with a, shaped head 12` adapted to receivea lwrench.

f AA pston13provi'ded with suitable 'paclrl and is normally surged'tdownwardly.. by means ofi-a hel-ical spring 14,- suchlspring beling:preferably-f relatively stiff. f The piston :carries avpiston rodM-which! has a-reduced portion secured by a nut 16 to the'ffpistoii'.`

This piston rod extends through an elongated sleeve 17 formed integralwith the cyli-nder body 6, such guide or sleeve 17'also jing `rings ispositioned within the cylinder outer en'd of lthe cylinder 6. The headof.,

the lpiston rod is threaded and is screwed into an inset 19 mouldedwithinl the .vacuum or suction cup l2O, such cup being preferably formedof rubber. Thecylinder is provided with an upper aperture y21` and .alower aperture 22 which communicate-with coriesponding apertures in thebody portion l of the device. Apair of control pipes 23 and 24 areconnected with the'apertures 21 and 22, respectively, by vmeans ofheaded fittings 25 which are positioned-withintlie apertures in the bodyportiony 1, and are screwed into the pipes 23 and 24, such fittingsbeing preferably shouldered to fit the correspondingly `shaped aperture,and also provided with a slot 26 in theirouter ends, so that they may bereadily manipulated` by a suitable tool.

In operating the device the plate or slab of glass 27 isplaced upon thetable and compressed air ork other pressure fluid supplied the pipes 24.This forces the pistonsv 13 upwardly and collapses the vacuum cups 20 orsuction cups against the under side of the glass slab. e Thereafter,the. pressure is removed and the spring 14; retracts the pistons thusdrawing downwardly" on the attached suction cups'v and vsecurely holdingi the glass in tight contactwith the rings 9 and 10.: 4 Y

After polishing has takenplace and itis desired to release the cups,pressure-.fluid is admitted to the pipes 23 and thus forces the istons13 downwardl f thereb f with- P l: .l

drawing` the cups 2O from engagement with the plate of glass andreleasing` such plate.

It will be seen that a plate glass holder has been provided in which thesuction cups may be readily applied in a simultaneous mannenin which thesuction cups may be readily detached, and in which the breaking of thesuction orv vacuum at one of the cups does not influence theoperationor' the other cups.

' said iston downwardl 1 a rod carried b said piston, a suction cupcarried by the upper end of said rod, and means for admitting pressurefluid to opposite sides ot' said piston.

v 2. A plate glass holder comprising a stationary support having aplurality of regularly spaced packing rings adapted to support a glassplate, a cylinder mounted below each o said packing rings, a pistoncarried" within said cylinder, aspring urging said piston downwardly,con-duits leading` to said cylinder and opening` on opposite sides ofsaid piston, a piston rod carried by said piston and projecting,`upwardly through said cylinder, a vacuum cup carried by sai-d piston rodand normally positioned below the lowerplane of said glass plate, eachor' said Vacuum cups being free from connection with any other vaccumcup, whereby when suction is broken in one of said cups no cilect isproduced on any other cup, and whereby said cups may be pneumaticallyraised and lowered as desired.y

ln testimony that I claim the foregoing I have hereunto set my hand atButler, in the county o'Butler and State of PennsyL Vania.

JAMES CARRIE.

